The S series is the rolling stock of light metro used on

Line 3 Scarborough Line 3 Scarborough (originally known as the Scarborough RT or SRT) is a light rapid transit line that is part of the Toronto subway system in Toronto, Ontario, Canada. The line runs entirely within the suburban district of Scarborough, encomp ...

, part of the subway system of

Toronto Toronto ( ; or ) is the capital city of the Provinces and territories of Canada, Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the List of the largest municipalities in Canada by population, most pop ...

Ontario Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central C ...

, Canada. They were built from 1983 to 1986 for the Toronto Transit Commission (TTC) by the Urban Transportation Development Corporation (UTDC) in

Millhaven Millhaven may refer to: * Millhaven Institution, a Canadian prison * Millhaven, Ontario, a community in Canada * Millhaven Creek, Ontario, Canada *Millhaven, Georgia Millhaven is an unincorporated community in Screven County, Georgia, Screven Count ...

, Ontario. The trains use UTDC's proprietary

linear motor A linear motor is an electric motor that has had its stator and rotor "unrolled", thus, instead of producing a torque (rotation), it produces a linear force along its length. However, linear motors are not necessarily straight. Characteristicall ...

-based Intermediate Capacity Transit System (ICTS, now branded as Bombardier Innovia Metro) and are its Mark I model, which is also used by the Vancouver SkyTrain and the Detroit People Mover. They consist of 14 married pair sets (28 cars total) with fleet numbers 3000 to 3027, and are not compatible with the trains on other Toronto lines, which use conventional motors. Test runs took place in 1984 and full service began in 1985. When the line opened, 12 sets operated individually as two-car units. In 1986, two more sets were added, allowing sets to be coupled to form four-car units as ridership grew. All trains operate automatically without human intervention. Although they are capable of unmanned operations, as in Vancouver and Detroit, the TTC opted to use

one-person train operation One-person operation (OPO), also known as driver-only operation (DOO), one-man operation (OMO), single person train operation (SPTO), or one-person train operation (OPTO), similarly to Driver Controlled Operation, is operation of a train, bus, ...

on all Line 3 trains. Since the retirement of the remaining H-series trains in 2014, the S-series trains have been the oldest in operation on the entire subway system. They are also the only TTC rapid transit trains with a painted

livery A livery is an identifying design, such as a uniform, ornament, symbol or insignia that designates ownership or affiliation, often found on an individual or vehicle. Livery will often have elements of the heraldry relating to the individual or ...

since the G series, consisting of a unique lowercase "rt" logo, referring to the line's original name of "Scarborough RT". Since 2015, the cars have been undergoing refurbishment and the addition of blue shrink wrap on their exterior to prolong their lifespan until the Line 2 Bloor–Danforth subway extension to Scarborough City Centre is complete, which will result in the shutdown of Line 3 and the retirement of the S-series trains.

References

{{Toronto Transit Commission Toronto rapid transit passenger equipment Transport in Scarborough, Toronto Electric multiple units of Canada